APPLETON - The disappearance of Caitlyn Pa Chia Xiong, the 20-year-old Appleton woman who has been missing since early Thursday, is out of character with her past actions, police said Wednesday.

“Obviously, she’s an adult, and she has gone places," Sgt. Chue Thao told USA TODAY NETWORK-Wisconsin, "but she always let family know that she would be gone for the weekend, let’s say camping or out on vacation. The family would always know where she’s at. This one is really very, very unusual.”

Xiong was last seen at her home by a family member shortly after midnight Wednesday. She was reported missing to Appleton police by a friend late Thursday.

No activity has occurred on her phone or Facebook page or with her bank accounts since her disappearance, police said.